I have a question in regards to N1 speed and reverse thrust. During reverse thrust does the N1 speed actually increase? Or does it just move at idle and the thrust is simply redirected forwards? I just recieved an Air Tahiti A-340 DVD and during full reverse thrust, the thrust reversers are actuated, and then I saw the N1 speed increase to what seemed to be a much higher N1 than idle.
Thanx in advance,
Olympic A-340

Yes, first you must bring the throttle lever to idle before pulling back on the reverser activators. On reverse thrust, the engine will work the same, but with the bypass air re-directed foreward. I think there is a maximum reverse thrust that is much lower than normal max thrust, but I'm not sure in what percent. The N1 should show this difference.